Adjustable parallel gage.



Bfs. THOMPSON.

ADJUSTABLE PARALLEL GAGE.

APPLICATION Hugo FEB. 10. ms.

1,161,753. Patented Nov. 23, 1915.

WITNESSES IN VE/V TOR Boyd S.Thomps I I By w' ATTORNEYS I r GFFT BOYD S.THOMPSON, OF GRAND RAPIDS, MICHIGAN.

ADJUSTABLE PARALLEL GAGE.

Specification of Letters Patent.

Patented Nov. 23, 1915.

Application filed February 10, 1915. Serial No. 7,281.

To all whomit may concern Be it known that I, BOYD S. THoMPsoN, acitizen of the United States, and a resident of Grand Rapids, in thecounty of Kent and State of Michigan, have invented a new and ImprovedAdjustable Parallel Gage, of which the following is a full, clear, andexact description. a

The invention relates to gages used by machinists, pattern-makers andother mechanics, and its object is to provide a newand improvedadjustable parallel gage for- A practical embodiment of the invention isrepresented in the accompanying draw.- ings forming a part of thisspecification, in which similar characters of reference indicatecorresponding parts in all the views.

Figure l is a side elevation of the adjustable parallel gage; Fig. 2 isan inverted sectional plan view of the same on the line 22 of Fig. 1;Fig. 3 is a cross section of the same on the line 3-3 of Fig. 1; andFig. 4 is a perspective view of a graduated series of pairs of fillingpieces.

The gage block A is of a desired length and of a predetermined height(say one half inch), and in order to increase the height of the gageblock to suit the work in hand use is made of pairs of filling pieces Bfitting against the under side of the gage block A atthe ends thereof,the pairs of filling pieces being of different thicknesses. As shown inFig. l, for instance, the thinnest pair of filling pieces may be of aninch, the next the next 3t; and the last 5; of an inch. By the use ofany one or any number of pairs of filling pieces the block A may beraised to the desired height. In order to hold the pairs of fillingpieces B in position at the ends of the gage block A, use is made of aretainer C in the form of a band extending over the back of the block A,then around the ends to the front of the block with a view to providepockets at the ends of the gage block A for holdingrthe filling pieces Bin place. The terminals C of, the retainer C are bent into V-shaped formand fit into correspondingly shaped guideways A formed in the front.face of the gage block A. By the arrangement described the retainer 0can be readily moved vertically on the blockrA and the terminals C formabutments for the inner ends of the filling pieces" B placed in positionin the pockets at the time. The lower edges C of the front members ofthe retainer G are preferably curved inward to form flanges adapted tobear against the faces of the lowermost filling pieces B thus holdingthe fill- 7 ing pieces against accidental displacement in the pockets.

In practice the adjustable parallel gage is used in pairs, and each gageis provided with filling pieces of the same thickness. It will benoticed that by the arrangementdescribed the length of the parallel gageremains always the same while the height thereof can be readily changedby the use of the corresponding pair of filling pieces B. As the heightof the gage block A and the thickness of the filling pieces B is knownto mechanics it is evident that the gage can be readily set for anydesired height without requiring measuring on the part of the mechanic.

Having thus described my invention, I claim as new and desire to secureby Letters Patent:

1. An adjustable parallel gage, comprising a gage block, a retainer heldadjustable on the said gage block and forming pockets with the same, andfilling pieces held in the said pockets.

2. An adjustable parallel gage, comprising a parallel gage block, aretainer mounted to slide in the direction of the height of the gageblock and forming pockets at the ends of the gage block, and a pair oflike parallel filling pieces in the said pockets to increase the heightof the gage a distance corresponding to the thickness of the fillingpieces.

3. An adjustable parallel gage, comprising a parallel gage blockprovided on front with spaced vertical guideways, a retainer in the formof a band extending lengthwise along the back of'the block around theends and over onto the front, the terminals of the llll band slidinglyengaging the said guideways, the said band forming pockets, and fillingpieces in the said pockets.

4. An adjustable parallel gage, comprising a parallel gage. blockprovided on front with spaced vertical guideways, a retainer in the formof a band'extending lengthwise along the back of the block around theends and over onto the front, the terminals of the band slidinglyengaging the said guideways, the said band forming pockets, and fillingpieces in the said pockets, the inner ends of the filling piecesabutting the said band terminals to hold the filling pieces againstlengthwise movement.

5. An adjustable parallel gage, comprising a parallel gage blockprovided on front with spaced verticalguideways, a retainer in the formof a band extendinglengthwise said band and the ends of the said blockbeing adapted to form with each other pockets, and filling devices inthe said pockets and abutting the said terminal, the said flangesbearing against the faces of the filling pieces.

In testimony whereof I have signed my name to this specification in thepresence of witnesses. BOYD S. THOMPSON. -Witnesses:

ALFRED KRAFT, E. SHATTUOK.

two subscribing Copies of this patent may be obtained for five centseach, by addressing the Commissioner of Patents, Washington, D. G, v

